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"Redemption" features a brand new opening sequence, with various shots of the gate spinning, and Michael Shanks' name being removed to make way for Corin Nemec's in between Christopher Judge and Don S. Davis. The following episode, "Descent", has a different title sequence.

In most of the shots in "Abyss" where Ba'al is talking to O'Neill, Cliff Simon is actually talking to a stand-in for O'Neill and not Richard Dean Anderson due to the limited time Richard Dean Anderson had in which to film the episode.[1] A series of three different sets were used to represent the cells; a horizontal cell, a vertical cell and a pivoting cell for the scenes in which the chamber is seen rotating. A blend of shots filmed in all three sets was used each time O'Neill is retrieved from or returned to his cell.

"Disclosure" is the third clip show within Stargate SG-1, with the first being "Politics" and the second being "Out of Mind". None of the regular characters except General Hammond are featured.

"The Changeling" was written by Christopher Judge, who plays Teal'c. The parts of the episode where Teal'c is a human take place in Coquitlam, which is a city in the Greater Vancouver Regional District. (Vancouver, the city where Stargate SG-1 is filmed, is also part of this district.)

"Full Circle" is the last episode to feature Corin Nemec as a main cast member. It is also the last episode where Skaara (Alexis Cruz) appears.

"Redemption, Part 2" was nominated for a Gemini Award in the category "Best Visual Effects". "Descent" was nominated for a Gemini Award in the category "Best Visual Effects". "Nightwalkers" was nominated for a Gemini Award in the category "Best Photography in a Dramatic Program or Series". "Unnatural Selection" was nominated for a Leo in the category "Dramatic Series: Best Visual Effects". For "Unnatural Selection", Andy Mikita was nominated for a Leo Award in the category "Dramatic Series: Best Director". "Metamorphosis" won a Leo Award in the category "Dramatic Series: Best Make-Up".

As SG-1 and the SGC struggle to cope with Daniel's departure, they find themselves facing a new threat in the form of System Lord Anubis who has launched an attack against Earth by using an ancient weapon which will trigger a huge overload of energy directly into the Stargate and if the attack is successful, the entire planet will be destroyed. As the SGC scientists scramble to find a solution, Carter finds her abilities as both a scientist and military officer being put to the ultimate test with her woes later increasing when her rival, Dr. Rodney McKay (David Hewlett) later returns to the SGC from Russia, having been ordered to do so by the Pentagon while Jack still refuses to let a Russian soldier join SG-1 despite pressure from both Chekov and General Hammond while Teal'c goes offworld after learning that his wife is gravely ill and is left devastated when he learns that she has actually died. After learning that Earth is under attack, Teal'c, Bra'tac and Rya'c embark on a dangerous mission to find and destroy the weapon at any cost.

With the plan to contact the Asgard having failed, the SGC are left on their own and Carter attempts to find a solution while she continues to deal with McKay's unwelcomed presence. Meanwhile, Teal'c, Bra'tac and Rya'c prepare to launch an attack on the planet which has Anubis's weapon while Jonas later gives Carter an idea at saving the planet but it could result in Earth losing their Stargate and the Stargate Program being shut down for good.

SG-1 attempts to salvage a Goa'uld mothership that has been mysteriously abandoned in space near Earth. Unfortunately, the ship crashes in the ocean. SG-1 discovers that Thor's consciousness is still in the central computer.

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"Frozen"

Martin Wood

Robert C. Cooper

June 28, 2002 (2002-06-28) (Sci Fi Channel)

The Antarctic team investigating the site where the second Stargate was found discovers a frozen Ancient. The team starts to suffer the effects of a deadly virus and while she helps to heal the infected, it becomes clear that it's taking a toll.

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"Nightwalkers"

Peter DeLuise

Joseph Mallozzi & Paul Mullie

July 12, 2002 (2002-07-12) (Sci Fi Channel)

Bizarre behavior in a small American town proves to be the result of Goa'uld activity.

Dr. Felger worships SG-1, and when he has the chance to rescue them from a Goa'uld mothership, he doesn't hesitate.

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"Allegiance"

Peter DeLuise

Peter DeLuise

August 9, 2002 (2002-08-09) (Sci Fi Channel)

The Jaffa rebellion, the Tok'ra and their base commander Malek, and Stargate Command are temporarily forced to share Earth's Alpha Site (a secret refuge) when the Tok'ra are attacked. Suspicion between the Tok'ra and the Jaffa turns hostile when a series of murders occurs.

SG-1 visit Pangar, a planet once ruled by Ra. The Pangarans offer a wonder drug called Tretonin in exchange for gate addresses, but fail to mention that the drug is produced by using the progeny of the former Tok'ra queen Egeria. The drug also destroys the user's immune system, causing a crisis when supplies ran low. SG-1 calls in help from the Tok'ra Malek and Kelmaa. After Egeria is freed by the Tok'ra Kelmaa, she tells the remorseful Pangarans how to free themselves from the tretonin.

A reporter has information about the Stargate Program and threatens to broadcast it on television. The SGC offers a deal to allow her access to the Prometheus on the condition that nothing is aired until the Stargate Program is made public.

The Asgard have called all the Replicators in the Asgard galaxy to one planet, Halla, but the time dilation device that was meant to trap them on the planet has failed to activate. The Asgard want SG-1 to use the Prometheus to find out why.

The Russian team discovers a planet where Nirrti has been experimenting on the human population to create the perfect host.

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"Disclosure"

William Gereghty

Joseph Mallozzi & Paul Mullie

January 22, 2003 (2003-01-22) (Sky One)

The Americans and the Russians reveal the existence of the Stargate to the Chinese, French, and British governments. Senator Kinsey tries to use the meeting to hijack the program, but Hammond has a card up his sleeve.

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"Forsaken"

Andy Mikita

Damian Kindler

January 29, 2003 (2003-01-29) (Sky One)

SG-1 finds a wrecked spacecraft whose crew claims to have been fighting off aggressive aliens ever since they crashed. It later turns out that the crew are in fact prisoners of the Serrakin ship Ceberus. The Serrakin are an advanced race who once helped free the human Hebridans, descendents from the Celts, from the Goa'uld millennia ago. Since then, the two peoples have lived together in a largely harmonious society on the planet Hebridan.

Teal'c finds himself jumping between different realities of Earth and the planet Kresh'ta, where a meeting of 108 Jaffa rebel leaders are ambushed by the Goa'uld System Lords. Only Daniel seems to display any understanding of reality.

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"Memento"

Peter DeLuise

Damian Kindler

February 12, 2003 (2003-02-12) (Sky One)

On the maiden flight of the finished Prometheus, the reactor overloads, and SG-1 must find the Stargate buried on the alien planet Tagrea in order to obtain spare parts from Earth. Tagrea was once ruled by the Goa'uldHeru-ur, and the memory of his occupation was so traumatic that the Tagreans buried their Stargate and wiped out all traces of their earlier history, so as to make a new start. Despite opposition from xenophobic elements of the Tagrean military, the progressive Chairman Ashwan assists SG-1 in locating the Stargate and eventually opens relations with Earth.

SG-1 finds a planet where the population worship Ba'al and work in the mines to provide his representative, Lord Mot, with a tribute of naqahdah. SG-1 intends to stop him, but things get complicated when Jonas starts seeing visions that could kill him.

Daniel contacts Jack O'Neill and tells him that Anubis has located the Eye of Ra, an enormously powerful weapon. SG-1 must get the Eye from Abydos, before Anubis. Anubis appears over the planet and threatens to destroy it.